Finding the Fourth Proportional to 318,219.67, 438,690.83 and 253,117.95
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Solution
The fourth proportional to 318,219.67, 438,690.83 and 253,117.95 is: 348,942.99
Step by Step Solution
- Step 1: Write the proportion equation
318,219.67 : 438,690.83 = 253,117.95 : x - Step 2: Convert to fraction form
318,219.67/438,690.83 = 253,117.95/x - Step 3: Cross multiply
318,219.67x = 438,690.83 × 253,117.95 - Step 4: Simplify right side
318,219.67x = 111,040,523,573.40 - Step 5: Solve for x
x = 111,040,523,573.40/318,219.67 - Step 6: Final answer
x = 348,942.99
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.